Finite Element Analysis of Induction Motor Core Considering Rotating Magnetization in Electrical Steel Sheets

Based on 2-D magnetic property measurement system, this paper presents a complex vector magnetic property model to express the rotating magnetization in electrical steel sheet. In this model, the effective magnetic reluctivity coefficients are calculated according to the average magnetic energy density in one time period, and the effective magnetic hysteresis coefficients computed from the magnetic hysteresis loss. The effectiveness of the suggested modeling algorithm, when combined with finite element analysis, is verified with a stator core model of the induction motor. In order to take the rotating operation of the rotor into account, the air gap between the stator and rotor is chosen as solution boundary with complex value in this analysis.